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Causal-Forcing

Project page arXiv paper Official code

Causal-Forcing uses Causal ODE or Causal Consistency Distillation to drive asymmetric DMD as a theoretically correct initialization for real-time interactive video generation.

Causal-Forcing overview figure.

Teaser image source: Causal-Forcing project page.

Quick Start

T2V

uv sync --package flashdreams-causal-forcing --inexact
uv run --no-sync flashdreams-run-v2 \
  t2v-causal-forcing-wan2.1-t2v-1.3b-chunkwise \
  --output-path artifacts/causal-forcing.mp4 --timeout unbound -- \
  --prompt "A cat surfing" --total-blocks 7
Demo Presets Demo Arguments

Demo Presets

T2V

Preset Description
t2v-causal-forcing-wan2.1-t2v-1.3b-chunkwise Chunkwise Wan 2.1 1.3B T2V (len_t=3).
t2v-causal-forcing-wan2.1-t2v-1.3b-framewise Framewise Wan 2.1 1.3B T2V (len_t=1).

Developer Details

Integration Source Pipeline configurations
  • Minimum VRAM: about 24 GB.
  • PyTorch: 2.9 or newer.

Samples

prompt: "A cinematic closeup and detailed portrait of a reindeer standing in a snowy forest at sunset. The lighting is gorgeous and soft, with a golden backlight creating a warm and dreamy effect. Soft bokeh and lens flares add a magical touch, enhancing the cinematic quality of the image. The reindeer has a gentle expression, its fur glistening in the fading light. The background features a serene snowy landscape with tall trees silhouetted against the orange and pink hues of the setting sun. The color grade is rich and magical, capturing the essence of a winter wonderland at twilight. A close-up shot from a slightly elevated angle."
prompt: "A cinematic closeup and detailed portrait of a reindeer standing in a snowy forest at sunset. The lighting is gorgeous and soft, with a golden backlight creating a warm and dreamy effect. Soft bokeh and lens flares add a magical touch, enhancing the cinematic quality of the image. The reindeer has a gentle expression, its fur glistening in the fading light. The background features a serene snowy landscape with tall trees silhouetted against the orange and pink hues of the setting sun. The color grade is rich and magical, capturing the essence of a winter wonderland at twilight. A close-up shot from a slightly elevated angle."
image: https://raw.githubusercontent.com/thu-ml/Causal-Forcing/refs/heads/main/prompts/i2v/26-15/000001.png

Citation

If you use Causal-Forcing, please cite the original work:

@article{zhu2026causal,
  title={Causal Forcing: Autoregressive Diffusion Distillation Done Right for High-Quality Real-Time Interactive Video Generation},
  author={Zhu, Hongzhou and Zhao, Min and He, Guande and Su, Hang and Li, Chongxuan and Zhu, Jun},
  journal={arXiv preprint arXiv:2602.02214},
  year={2026}
}